drivers/clk/mediatek/clk-mt8183.c

Source file repositories/reference/linux-study-clean/drivers/clk/mediatek/clk-mt8183.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/mediatek/clk-mt8183.c
Extension
.c
Size
30568 bytes
Lines
912
Domain
Driver Families
Bucket
drivers/clk
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2018 MediaTek Inc.
// Author: Weiyi Lu <weiyi.lu@mediatek.com>

#include <linux/delay.h>
#include <linux/mfd/syscon.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include "clk-gate.h"
#include "clk-mtk.h"
#include "clk-mux.h"

#include <dt-bindings/clock/mt8183-clk.h>

static DEFINE_SPINLOCK(mt8183_clk_lock);

static const struct mtk_fixed_clk top_fixed_clks[] = {
	FIXED_CLK(CLK_TOP_CLK26M, "f_f26m_ck", "clk26m", 26000000),
	FIXED_CLK(CLK_TOP_ULPOSC, "osc", NULL, 250000),
	FIXED_CLK(CLK_TOP_UNIVP_192M, "univpll_192m", "univpll", 192000000),
};

/*
 * To retain compatibility with older devicetrees, we keep CLK_TOP_CLK13M
 * valid, but renamed from "clk13m" (defined as fixed clock in the new
 * devicetrees) to "clk26m_d2", satisfying the older clock assignments.
 * This means that on new devicetrees "clk26m_d2" is unused.
 */
static const struct mtk_fixed_factor top_divs[] = {
	FACTOR(CLK_TOP_CLK13M, "clk26m_d2", "clk26m", 1, 2),
	FACTOR(CLK_TOP_F26M_CK_D2, "csw_f26m_ck_d2", "clk26m", 1, 2),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_CK, "syspll_ck", "mainpll", 1, 1, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D2, "syspll_d2", "syspll_ck", 1, 2, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D2_D2, "syspll_d2_d2", "syspll_d2", 1, 2, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D2_D4, "syspll_d2_d4", "syspll_d2", 1, 4, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D2_D8, "syspll_d2_d8", "syspll_d2", 1, 8, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D2_D16, "syspll_d2_d16", "syspll_d2", 1, 16, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D3, "syspll_d3", "mainpll", 1, 3, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D3_D2, "syspll_d3_d2", "syspll_d3", 1, 2, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D3_D4, "syspll_d3_d4", "syspll_d3", 1, 4, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D3_D8, "syspll_d3_d8", "syspll_d3", 1, 8, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D5, "syspll_d5", "mainpll", 1, 5, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D5_D2, "syspll_d5_d2", "syspll_d5", 1, 2, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D5_D4, "syspll_d5_d4", "syspll_d5", 1, 4, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D7, "syspll_d7", "mainpll", 1, 7, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D7_D2, "syspll_d7_d2", "syspll_d7", 1, 2, 0),
	FACTOR_FLAGS(CLK_TOP_SYSPLL_D7_D4, "syspll_d7_d4", "syspll_d7", 1, 4, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_CK, "univpll_ck", "univpll", 1, 1, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D2, "univpll_d2", "univpll_ck", 1, 2, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D2_D2, "univpll_d2_d2", "univpll_d2", 1, 2, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D2_D4, "univpll_d2_d4", "univpll_d2", 1, 4, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D2_D8, "univpll_d2_d8", "univpll_d2", 1, 8, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D3, "univpll_d3", "univpll", 1, 3, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D3_D2, "univpll_d3_d2", "univpll_d3", 1, 2, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D3_D4, "univpll_d3_d4", "univpll_d3", 1, 4, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D3_D8, "univpll_d3_d8", "univpll_d3", 1, 8, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D5, "univpll_d5", "univpll", 1, 5, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D5_D2, "univpll_d5_d2", "univpll_d5", 1, 2, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D5_D4, "univpll_d5_d4", "univpll_d5", 1, 4, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D5_D8, "univpll_d5_d8", "univpll_d5", 1, 8, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVPLL_D7, "univpll_d7", "univpll", 1, 7, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVP_192M_CK, "univ_192m_ck", "univpll_192m", 1, 1, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVP_192M_D2, "univ_192m_d2", "univ_192m_ck", 1, 2, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVP_192M_D4, "univ_192m_d4", "univ_192m_ck", 1, 4, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVP_192M_D8, "univ_192m_d8", "univ_192m_ck", 1, 8, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVP_192M_D16, "univ_192m_d16", "univ_192m_ck", 1, 16, 0),
	FACTOR_FLAGS(CLK_TOP_UNIVP_192M_D32, "univ_192m_d32", "univ_192m_ck", 1, 32, 0),
	FACTOR(CLK_TOP_APLL1_CK, "apll1_ck", "apll1", 1, 1),
	FACTOR(CLK_TOP_APLL1_D2, "apll1_d2", "apll1", 1, 2),
	FACTOR(CLK_TOP_APLL1_D4, "apll1_d4", "apll1", 1, 4),
	FACTOR(CLK_TOP_APLL1_D8, "apll1_d8", "apll1", 1, 8),
	FACTOR(CLK_TOP_APLL2_CK, "apll2_ck", "apll2", 1, 1),
	FACTOR(CLK_TOP_APLL2_D2, "apll2_d2", "apll2", 1, 2),
	FACTOR(CLK_TOP_APLL2_D4, "apll2_d4", "apll2", 1, 4),
	FACTOR(CLK_TOP_APLL2_D8, "apll2_d8", "apll2", 1, 8),
	FACTOR(CLK_TOP_TVDPLL_CK, "tvdpll_ck", "tvdpll", 1, 1),
	FACTOR(CLK_TOP_TVDPLL_D2, "tvdpll_d2", "tvdpll_ck", 1, 2),
	FACTOR(CLK_TOP_TVDPLL_D4, "tvdpll_d4", "tvdpll", 1, 4),
	FACTOR(CLK_TOP_TVDPLL_D8, "tvdpll_d8", "tvdpll", 1, 8),
	FACTOR(CLK_TOP_TVDPLL_D16, "tvdpll_d16", "tvdpll", 1, 16),
	FACTOR(CLK_TOP_MMPLL_CK, "mmpll_ck", "mmpll", 1, 1),
	FACTOR(CLK_TOP_MMPLL_D4, "mmpll_d4", "mmpll", 1, 4),
	FACTOR(CLK_TOP_MMPLL_D4_D2, "mmpll_d4_d2", "mmpll_d4", 1, 2),
	FACTOR(CLK_TOP_MMPLL_D4_D4, "mmpll_d4_d4", "mmpll_d4", 1, 4),
	FACTOR(CLK_TOP_MMPLL_D5, "mmpll_d5", "mmpll", 1, 5),
	FACTOR(CLK_TOP_MMPLL_D5_D2, "mmpll_d5_d2", "mmpll_d5", 1, 2),
	FACTOR(CLK_TOP_MMPLL_D5_D4, "mmpll_d5_d4", "mmpll_d5", 1, 4),

Annotation

Implementation Notes